2 changed files with 408 additions and 0 deletions
--- a/doc/Read.pdf
+++ b/doc/Read.pdf
--- a/src/mathProblem.cpp
+++ b/src/mathProblem.cpp
@ -0,0 +1,408 @@
+#include <iostream>
+#include <fstream>
+#include <string>
+#include <vector>
+#include <map>
+#include <sstream>
+#include <ctime>
+#include <cstdlib>
+#include <cmath>
+#include <limits>
+
+using namespace std; 
+
+
+// 数学题目基类
+class MathProblem {
+protected:
+    vector<string> generatedProblems;//存储生成过的题目 
+    
+    int randInt(int min, int max) {//生成min-max范围的随机整数 
+        return min + rand() % (max - min + 1);
+    }
+    
+    bool isProblemExists(const string& problem) {
+        for (size_t i = 0; i < generatedProblems.size(); i++) {//循环，判断题目是否已经存在 
+            if (generatedProblems[i] == problem) {return true;}
+        }
+        return false;
+    }
+    
+public:
+    MathProblem() {}
+    virtual ~MathProblem() {}
+    
+    virtual string generateProblem() = 0;
+    
+    vector<string> generateProblems(int count) { //题目生成 
+        vector<string> problems;
+        int attempts = 0;
+        const int MAX_ATTEMPTS = 1000;
+        
+        while (problems.size() < count && attempts < MAX_ATTEMPTS) {
+            string problem = generateProblem();
+            if (!isProblemExists(problem)) {
+                problems.push_back(problem);
+                generatedProblems.push_back(problem);
+            }
+            attempts++;
+        }
+        return problems;
+    }
+    
+    void clear() {
+        generatedProblems.clear();
+    }
+};
+
+// 小学题目生成器
+class PrimaryMath : public MathProblem {
+private:
+    char getOperator() {
+        char operators[] = {'+', '-', '*', '/'};
+        return operators[rand() % 4];
+    }
+    
+    string Expression(int numCount) {
+        stringstream expr;
+        for (int i = 0; i < numCount; i++) {
+            expr << randInt(1, 100);
+            if (i < numCount - 1) {
+                expr << " " << getOperator() << " ";
+            }
+        }
+        return expr.str();
+    }
+    
+    string addParentheses(const string& expr, int numCount) {
+        if (numCount > 2 && randInt(0, 1)) {
+            if (numCount == 3) {
+                if (randInt(0, 1)) {
+                    return "(" + expr + ")";
+                }
+            } else {
+                stringstream result;
+                int splitPoint = randInt(1, numCount-1);
+                result << "(";
+                for (int i = 0; i < splitPoint; i++) {
+                    result << randInt(1, 100);
+                    if (i < splitPoint - 1) {
+                        result << " " << getOperator() << " ";
+                    }
+                }
+                result << ") " << getOperator() << " ";
+                for (int i = splitPoint; i < numCount; i++) {
+                    result << randInt(1, 100);
+                    if (i < numCount - 1) {
+                        result << " " << getOperator() << " ";
+                    }
+                }
+                return result.str();
+            }
+        }
+        return expr;
+    }
+    
+public:
+    string generateProblem() {
+        int numCount = randInt(2, 5);
+        stringstream problem;
+        
+        string expression = Expression(numCount);
+        expression = addParentheses(expression, numCount);
+        problem << expression << " = ";
+        
+        return problem.str();
+    }
+};
+
+// 初中题目生成器
+class JuniorMath : public MathProblem {
+private:
+    char getOperator() {
+        char operators[] = {'+', '-', '*', '/'};
+        return operators[rand() % 4];
+    }
+    
+    string Expression(bool& hasAdvancedOp) {
+        stringstream part;
+        if (!hasAdvancedOp && randInt(0, 1)) {
+            if (randInt(0, 1)) {
+                part << randInt(1, 10) << "^2";  // 使用^2表示平方 
+            } else {
+                part << "√" << randInt(1, 100);
+            }
+            hasAdvancedOp = true;
+        } else {
+            part << randInt(1, 100);
+        }
+        return part.str();
+    }
+    
+    string addOperator(const string& expr, bool hasAdvancedOp) {
+        if (!hasAdvancedOp) {
+            if (randInt(0, 1)) {
+                return "(" + expr + ")^2";
+            } else {
+                return "√(" + expr + ")";
+            }
+        }
+        return expr;
+    }
+    
+public:
+    string generateProblem() {
+        int numCount = randInt(2, 5);
+        stringstream problem;
+        bool hasAdvancedOp = false;
+        
+        for (int i = 0; i < numCount; i++) {
+            problem << Expression(hasAdvancedOp);
+            if (i < numCount - 1) {
+                problem << " " << getOperator() << " ";
+            }
+        }
+        
+        string expression = problem.str();
+        expression = addOperator(expression, hasAdvancedOp);
+        
+        stringstream finalProblem;
+        finalProblem << expression << " = ";
+        return finalProblem.str();
+    }
+};
+
+// 高中题目生成器
+class SeniorMath : public MathProblem {
+private:
+    char getOperator() {
+        char operators[] = {'+', '-', '*', '/'};
+        return operators[rand() % 4];
+    }
+    
+    string getTrigFunction() {
+        string functions[] = {"sin", "cos", "tan"};
+        return functions[rand() % 3];
+    }
+    
+    string Expression(bool& hasTrigOp) {
+        stringstream part;
+        if (!hasTrigOp && randInt(0, 1)) {
+            part << getTrigFunction() << "(" << randInt(1, 100) << ")";
+            hasTrigOp = true;
+        } else {
+            part << randInt(1, 100);
+        }
+        return part.str();
+    }
+    
+    string addTrigFunction(const string& expr, bool hasTrigOp) {
+        if (!hasTrigOp) {
+            return getTrigFunction() + "(" + expr + ")";
+        }
+        return expr;
+    }
+    
+public:
+    string generateProblem() {
+        int numCount = randInt(2, 5);
+        stringstream problem;
+        bool hasTrigOp = false;
+        
+        for (int i = 0; i < numCount; i++) {
+            problem << Expression(hasTrigOp);
+            if (i < numCount - 1) {
+                problem << " " << getOperator() << " ";
+            }
+        }
+        
+        string expression = problem.str();
+        expression = addTrigFunction(expression, hasTrigOp);
+        
+        stringstream finalProblem;
+        finalProblem << expression << " = ";
+        return finalProblem.str();
+    }
+};
+
+struct Account {
+	
+    string username;
+    string password;
+    string type;
+};
+
+vector<Account> accounts;
+MathProblem* currentGenerator = NULL;
+string nowUserType = "";
+string nowUsername = "";
+
+bool Verify(const string& username, const string& password, string& userType);  //账号验证函数 
+void createFolder(const string& username);//创建用户文件夹 
+string getTimestamp();//获取时间戳 
+void saveToFile(const vector<string>& problems, const string& username);//保存题目到文件夹中 
+void Login();//用户登录 
+void ProblemGeneration_Menu();//题目生成过程菜单 
+void TypeSwitching();//类型转换 
+
+
+bool Verify(const string& username, const string& password, string& userType) { 
+    for (size_t i = 0; i < accounts.size(); i++) {
+        if (accounts[i].username == username && accounts[i].password == password) { //检验账号密码是否正确，正确的话就提取账号类型 
+            userType = accounts[i].type;
+            return true;
+        }
+    }
+    return false;
+}
+
+// 创建用户文件夹
+void createFolder(const string& username) {
+    string folderName = username + "_papers";
+    string command = "mkdir \"" + folderName + "\" 2>nul";
+    system(command.c_str());
+}
+
+// 获取当前时间戳
+string getTimestamp() {
+    time_t now = time(NULL);
+    struct tm* timeinfo = localtime(&now);
+    char filename[100];
+    strftime(filename, sizeof(filename), "%Y-%m-%d-%H-%M-%S.txt", timeinfo);
+    return string(filename);
+}
+
+// 保存题目到文件
+void saveToFile(const vector<string>& problems, const string& username) {
+    createFolder(username);
+    string filename = getTimestamp();
+    string fullPath = username + "_papers/" + filename;
+    
+    cout << "正在保存文件到: " << fullPath << endl;
+    
+    ofstream file(fullPath.c_str());
+    if (file.is_open()) {
+        for (size_t i = 0; i < problems.size(); i++) {
+            file << (i + 1) << ". " << problems[i] << "\n\n";
+        }
+        file.close();
+        cout << "题目已成功保存到: " << fullPath << endl;
+    } else {
+        cout << "错误：无法创建文件 " << fullPath << endl;
+    }
+}
+
+// 创建题目生成器
+MathProblem* createGeneratorByType(const string& type) {
+    if (type == "小学") return new PrimaryMath();
+    else if (type == "初中") return new JuniorMath();
+    else if (type == "高中") return new SeniorMath();
+    return NULL;
+}
+
+// 处理类型切换
+void TypeSwitching() {
+	while(true){
+    cout << "如需切换类型，请输入\"切换为XX\"（XX为小学、初中、高中），直接按回车继续当前模式: ";
+    
+    string input;
+    getline(cin, input);
+    if (input.empty()) {
+        cout << "继续使用当前" << nowUserType << "出题模式" << endl;
+        return;
+    }
+    string newType = input.substr(6);
+        
+        if (newType == "小学" || newType == "初中" || newType == "高中") {
+            nowUserType = newType;
+            if (currentGenerator) {
+                delete currentGenerator;
+                currentGenerator = createGeneratorByType(newType);
+            }
+            
+            cout << "已切换为" << newType << "出题模式" << endl;
+            return;
+        } else {
+            cout << "请输入小学、初中和高中三个选项中的一个" << endl;
+            continue;
+        }
+    }
+}
+
+// 处理用户登录
+void Login() {
+    string username, password;
+    
+    while (true) {
+    	cout << "===== 中小学数学卷子自动生成程序 =====" << endl;
+        cout << "请输入用户名和密码（用空格隔开）: ";
+        cin >> username >> password;
+        
+        string userType;
+        if (Verify(username, password, userType)) {
+            nowUsername = username;
+            nowUserType = userType;
+            
+            if (currentGenerator) delete currentGenerator;
+            currentGenerator = createGeneratorByType(userType);
+            
+            cout << "当前选择为" << userType << "出题" << endl;
+            break;
+        } else {
+            cout << "请输入正确的用户名、密码" << endl;
+        }
+    }
+}
+
+// 处理题目生成过程
+void ProblemGeneration_Menu() {
+    while (true) {
+        cout << "准备生成" << nowUserType << "数学题目，请输入生成题目数量（10-30，-1退出）: ";
+        int count;
+        cin >> count;
+        
+        if (count == -1) {
+            if (currentGenerator) currentGenerator->clear();
+            cout<< "已退出程序，请重新登录" <<endl;
+            system("cls");
+            Login();
+            continue;
+        }
+        
+        if (count < 10 || count > 30) {
+            cout << "题目数量应在10-30之间" << endl;
+            continue;
+        }
+        
+        vector<string> problems = currentGenerator->generateProblems(count);
+        saveToFile(problems, nowUsername);
+        cin.ignore(numeric_limits<streamsize>::max(), '\n');
+        // 类型切换功能调用
+        TypeSwitching();
+    }
+}
+
+// 主函数
+int main() {
+    srand(time(NULL));
+    accounts.push_back((Account){"张三1", "123", "小学"});
+    accounts.push_back((Account){"张三2", "123", "小学"});
+    accounts.push_back((Account){"张三3", "123", "小学"});
+    
+    accounts.push_back((Account){"李四1", "123", "初中"});
+    accounts.push_back((Account){"李四2", "123", "初中"});
+    accounts.push_back((Account){"李四3", "123", "初中"});
+    
+    accounts.push_back((Account){"王五1", "123", "高中"});
+    accounts.push_back((Account){"王五2", "123", "高中"});
+    accounts.push_back((Account){"王五3", "123", "高中"});
+    
+    
+    Login();
+    ProblemGeneration_Menu();
+    
+    if (currentGenerator) delete currentGenerator;
+    
+    cout << "程序结束，感谢使用！" << endl;
+    return 0;
+}